Question

what is the best definition of mutualism? one organism benefits and the other is not affected. two organisms fight for the same food. both organisms help each other and benefit. one organism is hurt and the other is helped.

Explanation:

Mutualism is a symbiotic relationship where all participating organisms gain a fitness benefit from their interaction. The other options describe commensalism (one benefits, other unaffected), competition (fighting for resources), and parasitism (one harmed, one helped) respectively.

Answer:

Both organisms help each other and benefit.